CN103716614A - Display device - Google Patents

Abstract

The invention provides a display device, which belongs to the field of display technology, and can solve the problems of large volume and high cost of the existing 3D display devices using spectral separation. The display device of the present invention includes: a display light source, the display light source includes at least one monochromatic laser with tunable wavelength, and when displaying each 3D picture, the monochromatic laser can at least emit the first laser at the first moment , and emit a second laser at a second moment, and the peak wavelength of the first laser is different from that of the second laser, wherein the first moment is continuous with the second moment, and the first laser is used for The first frame of picture is displayed, and the second laser is used to display the second frame of picture.

Description

a display device

technical field

The invention belongs to the field of display technology, and in particular relates to a display device.

Background technique

Spectrum separation technology is currently a more advanced stereoscopic display technology, which is embodied in 3D display devices.

Wherein, the 3D display device includes: a display light source, the display light source adopts two or more sets of spectrally separated laser light sources, and the peak wavelengths of the same-color laser light emitted by each group of laser light sources are different. Taking two sets of laser light sources as an example for the laser light source, specifically, each set of laser light sources includes three monochromatic lasers, namely red lasers, blue lasers, and green lasers, and each of the two sets of laser light sources The peak wavelengths of laser light emitted by two monochromatic lasers of the same color are different. At this time, the red light emitted by the two red lasers is red laser 1 and red laser 2 respectively, the green light emitted by the two green lasers is green laser 1 and green laser 2 respectively, and the green light emitted by the two blue lasers is respectively The emitted blue light is blue laser 1 and blue laser 2 respectively. There is no spectral overlap between the two groups of laser light sources. The image composed of red laser 1, green laser 1 and blue laser 1 enters one eye of a person, and the red laser 2. The image formed by the green laser 2 and the blue laser 2 enters the other eye of the person, thus forming a stereoscopic image. The red laser, green laser and blue laser equipment obtained after spectral separation are narrow-band filter glasses. The biggest difference between spectral separation stereoscopic imaging technology and traditional stereoscopic imaging technology is that it uses spectral separation method to achieve high separation of left and right eye stereoscopic images, and separates images according to different wavelengths of different colors of light without any signal conversion process. Therefore it is also called passive stereo imaging. Compared with the traditional stereoscopic imaging display, the spectrum separation display technology has the following advantages: 1. The left and right stereoscopic image pairs are strictly filtered and highly separated, and there is no ghosting phenomenon when wearing glasses to watch the stereoscopic image; 2. The image quality is good and there is no flicker , good comfort, long-term viewing without dizziness; 3. The glasses do not need to be equipped with power supply and complicated circuits, and the glasses are light, so the comfort is better; 4. No signal synchronization transmitter is required, the head can move freely, and the wearer There will be no interference with each other, which can meet the application of a large number of audiences.

The inventors have found that there are at least the following problems in the prior art: a set of monochrome lasers is required to generate a set of laser light sources. Taking the above-mentioned 3D display device for stereoscopic display as an example, simply speaking, two sets of laser light sources emit six beams of monochrome lasers. Lasers (that is, red laser 1 and red laser 2, green laser 1 and green laser 2, blue laser 1 and blue laser 2), require six monochromatic lasers, that is to say, a monochromatic laser corresponds to a peak emission wavelength of laser light. Furthermore, the 3D display device is bulky and expensive.

Contents of the invention

The technical problem to be solved by the present invention includes, aiming at the problems of the existing 3D display devices, providing a display device with a compact structure and relatively low cost.

The technical solution adopted to solve the technical problem of the present invention is a display device, which includes: a display light source, the display light source includes at least one wavelength-tunable monochromatic laser, and when each 3D picture is displayed, the monochromatic laser At least the first laser light can be emitted at the first moment, and the second laser light can be emitted at the second moment, and the peak wavelength of the first laser light is different from that of the second laser light, wherein the first moment is different from the second laser light Continuously at all times, the first laser is used to display a first frame of pictures, and the second laser is used to display a second frame of pictures.

The monochromatic laser in the display device of the present invention can emit the first laser at the first moment and the second laser at the second, and the peak wavelengths of the first laser and the second laser are different, so it is different from the existing two phases. Compared with a display light source that emits lasers of the same color with two peak wavelengths at adjacent times and requires two single-color lasers, the structure of the display device in this embodiment is more compact, and the production cost is reduced at the same time.

Preferably, the display light source includes three wavelength-tunable monochromatic lasers, and the three monochromatic lasers include red lasers, green lasers and blue lasers,

At the first moment, the red laser emits the first red laser, the green laser emits the first green laser, the blue laser emits the first blue laser, and the first red laser, the first The green laser and the first blue laser are used to display the first frame;

At the second moment, the red laser emits the second red laser, the green laser emits the second green laser, the blue laser emits the second blue laser, and the second red laser, the second The green laser and the second blue laser are used to display the second frame of picture.

Preferably, the display light source further includes: a signal generating module, a laser driving module, a controller,

The controller controls the signal generating module to generate different current signals, the signal generating module provides the different current signals to the laser driving module, and the laser driving module generates according to the received different current signals Different driving currents are used to drive the corresponding monochromatic lasers to emit the first laser or the second laser.

Further preferably, the display light source further includes: a monitoring module,

The monitoring module is connected to the corresponding monochromatic laser, and is used to monitor the peak wavelength of the laser emitted by the monochromatic laser, and the monitoring module feeds back the peak wavelength of the first laser or the second laser to the controller , to adjust the current output of the laser driver module.

Further preferably, the display light source further includes: an automatic control module,

The monitoring module feeds back the peak wavelength of the first laser or the second laser to the controller through the automatic control module, so as to adjust the current output of the laser driving module.

Preferably, the display light source further includes: a coupler,

The monochromatic lasers are respectively connected to the coupler through their corresponding optical fibers, and are used to transmit the first laser light or the second laser light emitted at the same time to the display module through the same propagation path through the coupler, so that The display device displays images.

Further optionally, the display light source further includes: a projection module,

The projection module is arranged between the coupler and the display module, and is used for processing the laser output through the coupler and projecting it on the display module to display corresponding images.

Further optionally, the display light source further includes: at least one scattering rod and a light guide plate,

The scattering rod is used to diffuse the laser light from the coupler, and form a surface light source through the light guide plate.

It is further preferred that the display light source further includes a reflector lampshade, and the scattering rod includes: a cavity of the scattering rod, and scattering particles arranged in the cavity of the scattering rod, and a laser inlet is arranged at one end of the cavity of the scattering rod, The other end is provided with a reflective sheet, and the reflective lampshade is arranged on the side of the cavity of the scattering rod away from the light guide plate, and the reflective sheet cooperates with the emitting lampshade to reflect the laser light onto the light guide plate.

Preferably, the display light source is a laser light source array,

The laser light source array includes red laser light sources, green laser light sources, and blue laser light sources arranged at intervals, and each of the red laser light sources, green laser light sources, and blue laser light sources includes at least one laser light.

Description of drawings

1 is a schematic diagram of a rear projection display device according to Embodiment 1 of the present invention;

2 is a schematic diagram of a liquid crystal display device according to Embodiment 1 of the present invention;

Fig. 3 is the schematic diagram of the laser output of embodiment 1 of the present invention;

Fig. 4 is the schematic diagram of the coupler of embodiment 1 of the present invention;

FIG. 5 is a structural diagram of a display light source according to Embodiment 1 of the present invention;

Fig. 6 is a sectional view of Fig. 5 of Embodiment 1 of the present invention;

7 is a structural diagram of a scattering rod according to Embodiment 1 of the present invention;

FIG. 8 is a structural diagram of another display light source according to Embodiment 1 of the present invention;

FIG. 9 is a schematic diagram of a laser light source array according to Embodiment 1 of the present invention.

The reference signs are: 101, red laser; 102, green laser; 103, blue laser; 104, coupler; 105, projection module; 106, optical fiber; 107, scattering rod; 108, interface; 109, light guide plate; 110. Reflector lampshade; 111. Scattering rod cavity; 112. Scattering particles; 113. Reflector; 114. LED light source array; 115. Diffusion plate; 116. Optical diaphragm; 117. Red laser light source; 118. Green Laser light source; 119. Blue laser light source.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

As shown in Figures 1 to 9, this embodiment provides a display device, which includes: a display light source, the display light source includes at least one single-primary-color laser with tunable wavelength, and when each 3D picture is displayed, the single-primary-color The laser is at least capable of emitting a first laser light at a first moment and a second laser light at a second moment, and the peak wavelengths of the first laser light and the second laser light are different, wherein the first moment is different from the second laser light Two consecutive times, the first laser is used to display the first frame of pictures, and the second laser is used to display the second frame of pictures.

The monochromatic laser of the display light source in this embodiment can emit the first laser light at the first moment, and emit the second laser light at the second moment, that is to say, a single primary color laser can emit two kinds of peak wavelengths at two adjacent moments. Same-color laser, compared with the existing same-color laser that emits two peak wavelengths at two adjacent times, and both require two single-color lasers as a display light source, the structure of the display device in this embodiment is more compact, and the production cost is reduced at the same time .

It should be noted that the display device provided in this embodiment needs to cooperate with corresponding narrow-band filter glasses to realize 3D display. The lens of the narrow-band filter sun glasses is a filter with a specific wavelength and a band-pass function. , is a filter with band-pass function for red, green and blue, especially a filter with narrow-band band-pass function for specific bands of red, green and blue spectra, usually composed of notch filters composition. At this time, you can watch the 3D picture.

Preferably, the display light source in this embodiment includes three wavelength-tunable monochromatic lasers, and the three monochromatic lasers include a red laser 101, a green laser 102, and a blue laser 103. At the first moment, the The first red laser emitted by the red laser 101, the first green laser emitted by the green laser 102, the first blue laser emitted by the blue laser 103, and the first red laser, the first green laser, the first The blue laser is used to display the first frame; at the second moment, the second red laser emitted by the red laser 101, the second green laser emitted by the green laser 102, and the second green laser emitted by the blue laser 103 The second blue laser, and the second red laser, the second green laser, and the second blue laser are used to display the second frame. The first frame of picture and the second frame of picture enter the left eye and right eye of the viewer respectively, forming a three-dimensional picture.

Of course, any one or any two of the red laser 101 , the green laser 102 , and the blue laser 103 in the display light source may be wavelength-tunable monochromatic lasers. At this time, the structure of the display device is more compact than that of the existing 3D display device, and the cost is lower.

Current adjustment is usually used to change the peak wavelength of the laser light emitted by the monochromatic laser. In this embodiment, preferably, the display light source further includes: a signal generating module, a laser driving module, and a controller, the controller controls the signal generating module to generate different current signals, and the signal generating module converts the different The current signal is provided to the laser driving module, and the laser driving module generates different driving currents according to different current signals received, and is used to drive the corresponding monochromatic laser to emit the first laser light or the second laser light. Two lasers. That is to say, laser light with different peak wavelengths is emitted according to different driving currents.

As shown in Figures 1 and 2, specifically, the display light source includes a wavelength-tunable red laser 101, a green laser 102, and a blue laser 103. At the first moment, the first red laser emitted by the red laser 101 , the first green laser emitted by the green laser 102, the first blue laser emitted by the blue laser 103, and the first red laser, the first green laser, and the first blue laser are used to display the first frame ; at the second moment, the second red laser emitted by the red laser 101, the second green laser emitted by the green laser 102, the second blue laser emitted by the blue laser 103, and the second red laser The laser, the second green laser, and the second blue laser are used to display the second frame of picture. The first frame of picture and the second frame of picture are the shooting results of different angles of the same picture, and enter the viewer's left eye and right eye respectively through the narrow-band filter glasses, thus forming a three-dimensional picture.

The principle that the peak wavelength of the laser light emitted by the monochromatic laser can be tuned will be described in detail below. Generally speaking, semiconductor materials have a very wide gain bandwidth, for example, the bandwidth is 50nm for InGaAsP/InP materials, and 250nm for quantum well materials, so theoretically, semiconductor lasers can be adjusted within this range. The refractive index of semiconductor materials and the wavelength corresponding to the maximum gain are easily changed by changes in temperature, pressure, carrier concentration and electric field strength. Among them, relying on changing the carrier concentration is the most common method for wavelength tuning. Monolithic tunable semiconductor lasers have two structures, one is based on Bragg reflection gratings, such as multi-band DBR, multi-electrode DFB, etc. Their wavelength tuning principle is mainly achieved by changing the refractive index of the grating reflection area, and then changing the Bragg wavelength. The maximum wavelength tuning range is limited by the maximum change range of the refractive index of the grating area. At present, the maximum tuning range of this type of laser is 10nm by means of current injection. There is a grating used for frequency selection and tuning in the cavity of this type of laser.

The other uses a coupled cavity or a non-matched grating, which changes the relationship between the wavelength change and the carrier concentration change and greatly expands the tuning range. For example, vertical coupling filter type, superstructured grating DBR, Y-cavity laser, etc., their tuning range can reach tens to one hundred nanometers.

The following are the properties of several tunable semiconductor lasers:

laser structure Tuning range Linewidth (MHz) tuning speed Multi-segment DFB Consecutive several nm Less than a few MHz 0.1ns Multi-segment DBR Consecutive several nm less than 10MHz 1ns Integrated DFB Consecutive several nm a few MHz a few ms TTG Consecutive several nm Less than tens of MHz 1ns SSGDBR Discontinuous 100nm Less than tens of MHz 0.1ns SGDBR Discontinuous 100nm Less than tens of MHz 0.1ns

It can be seen from the table that, except for the tuning speed of the integrated DFB which is a few ms, the corresponding speeds of other lasers are extremely short, which is much smaller than that of the projection system.

In addition, since the laser emission wavelength line width is extremely narrow, the tuning of the wavelength in a small range basically has no effect on the emission intensity, or even if there is a slight fluctuation, it will not affect the final viewing.

The basic principle of wavelength adjustment is that the refractive index of semiconductor materials will change with the difference of carrier concentration (different current). There are three factors that cause the refractive index to change with the current concentration: 1. Band filling effect, that is, with the increase of injected carriers, the Fermi level (Ef) of the conduction band and the valence band move to the high energy direction, which is equivalent to The band gap width increases; 2. The energy band shrinkage effect, which is opposite to the result produced by the energy band filling effect; 3. The plasma effect. Among the three influencing factors, the first one has the greatest influence.

Taking the multi-electrode DBR-LD tunable semiconductor laser as an example, its structure is generally divided into three areas: the gain area, the phase shift area and the film-selected grating. The function of the phase shift area is to make the resonant wavelength λ _m consistent with the Bragg wavelength λ _b , that is, to satisfy the phase condition Φ1=Φ2+2πm, where Φ1 is the phase change of the grating area, and Φ2 is the phase change of the gain area and the phase shift area. The Bragg distributed feedback grating selects a single longitudinal mode, and the gain zone is used to adjust the output power. For tunable DBR-LD lasers, the wavelength tuning range can be expressed by the following formula:

$\mathrm{<span\; class="notranslate">\; \&Delta;\&lambda;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&Lambda;\&Delta;</span>}{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; ef</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&Lambda;\&Gamma;</span>}<span\; class="notranslate">\; \&CenterDot;</span>\frac{{\mathrm{<span\; class="notranslate">\; dn</span>}}_{\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; ef</span>}}}{\mathrm{<span\; class="notranslate">\; dN</span>}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; J</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; ikB</span>}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; 2</span>}}$

是单位载流子浓度引起的折射率改变，B是辐射复合系数，J_d是注入电流密度。where Λ is the grating period, Δn _R,ef is the effective refractive index change in the grating region, Γ is the mode confinement factor,

is the refractive index change caused by the unit carrier concentration, B is the radiative recombination coefficient, and J _d is the injection current density.

It can be seen from the above formula that a larger Γ, that is, a thicker waveguide layer corresponds to a larger tuning range, and Δλ becomes larger with the increase of the injected current, but the thermal effect caused by excessive current injection will affect the work of the device, so the injected The current should not be too large.

In addition, the wavelength tuning range is also related to the composition of the waveguide layer. When the wavelength _λg corresponding to the modified component is closer to the lasing wavelength, the tuning range is larger.

Semiconductor materials in the red light region include: GaAlAs/GaAs, InGaP/GaAsP, InGaAlP.

There are three kinds of blue-light semiconductor materials: SiC, nitrides represented by GaN, and II-IV semiconductors with wide band gaps.

At present, the laser in the green band is relatively difficult to obtain. The methods that can produce green laser are as follows: 1. It is obtained by frequency doubling of Nd-doped lasers. This is the most commonly used method to obtain green lasers. The characteristic efficiency of this type of laser is still It is too low, bulky, expensive, and very sensitive to temperature, so it is not suitable for widespread deployment in high-volume applications; 2. InGaN semiconductor lasers on non-polarized and semi-polarized GaN substrates. The continuous output wavelength extends to the green region of 520-525nm; 3. VECSEL (vertical external-cavity surface-emitting laser) laser, this method combines the convenience of semiconductor lasers and extra-cavity frequency doubling methods, making green lasers more efficient Compact and miniaturized; 4. The proposed method is to directly use a near-infrared semiconductor laser module plus a single-pass frequency doubling crystal combination to obtain green light output. This method is cheaper in cost and has the highest level of integration. This laser The module length is only 3.6mm. The green laser obtained by using the frequency doubling principle in methods 1 and 4 described above is not easy to tune the wavelength.

As shown in Figure 3, since the wavelength of the laser emitted by the monochromatic laser will drift, and the output power of the monochromatic laser itself will also change, in order to stabilize the laser emitted by the monochromatic laser, the display light source is also It includes: a monitoring module connected to the corresponding monochromatic laser for monitoring the peak wavelength of the laser light emitted by the monochromatic laser, and the monitoring module converts the peak value of the first laser or the second laser The wavelength is fed back to the controller to regulate the current output of the laser driver module. That is to say, the monitoring module detects whether the peak wavelength of the first laser or the second laser emitted by the monochromatic laser meets the laser with the peak wavelength required to display the image, and feeds back the bias current signal of the laser to the controller, and then The driving current is adjusted by the laser driver to control the peak wavelength of the laser light emitted by the monochromatic laser.

Still further preferably, the display light source further includes: an automatic control module, the monitoring module feeds back the peak wavelength of the first laser or the second laser to the controller through the automatic control module, so as to adjust the laser driving module current output. Of course, the display light source is also provided with a protection circuit, and the protection circuit is connected to the laser driving module for protecting the laser driving module and providing a corresponding driving current for the monochromatic laser.

Preferably, the display light source further includes: a coupler 104, the monochromatic lasers are respectively connected to the coupler 104 through corresponding optical fibers 106, and are used to combine the first laser light or the second laser light emitted at the same time A beam of laser light is synthesized through the coupler 104, and then connected to a display module through an optical fiber 106, so that the display device can display images. Simply put, as shown in FIG. 4, that is, when input light 1, input light 2, and input light 3 are respectively input to the coupler 104 through three different optical fibers 106, and then synthesized by the coupler 104, they are passed through a An optical fiber 106 outputs light. Wherein, the coupler 104 is generally a wavelength division multiplexer. And the input light 1, input light 2, and input light 3, that is, the laser light emitted by each monochromatic laser, has the characteristics of a narrow-band spectrum, and the laser light emitted in adjacent time periods forms the first frame and the second frame. The spectra corresponding to the frame images do not overlap or overlap very little, and crosstalk is not easy to occur.

As shown in Figure 1, the display device in this embodiment can be a rear projection projection system, and the display device can further preferably, the display light source also includes: a projection module 105, and the projection module 105 passes through an optical fiber 106 is connected with the coupler 104, and is used for processing a beam of laser output through the coupler 104, and projecting and displaying corresponding images. That is to say, the image to be displayed is projected onto a screen through the projection module 105, and the light is reflected into the user's eyes, which can be applied to a projection device.

As shown in Figure 2, the display device in the embodiment can be a rear-projection display device, which is similar to the principle of Figure 1 in the above, the difference is that the laser from the coupler 104 is directly directed to the display screen of the display device through the projection device , then you can watch the corresponding video screen.

As shown in Figure 6, the display device in this embodiment can be a liquid crystal display device, and the display light source is also the backlight module in the liquid crystal display device. At this time, it can be further preferred that the display light source also includes: At least one scattering rod 107 and a light guide plate 109 , the scattering rod 107 is connected to the coupler 104 through an optical fiber 106 for diffusing the laser light from the coupler 104 and forming a surface light source through the light guide plate 109 . When there is one diffuser rod 107, the diffuser rod 107 can be arranged at the side of the light-emitting surface of the light guide plate 109, which is equivalent to a side-type backlight module; when there are multiple diffuser rods 107, this At this time, all the scattering rods 107 can be connected together and arranged on the side away from the light-emitting surface of the light guide plate 109, which is equivalent to a direct-type backlight module. The display light source in this example improves the utilization rate of light, thereby making the display device The display is better.

As shown in FIG. 7, wherein, further preferably, the scattering rod 107 includes: a cavity of the scattering rod, and scattering particles 112 arranged in the cavity of the scattering rod, and one end of the cavity of the scattering rod is provided with a The interface 108 connected to the optical fiber 106 has a reflector 113 on the other end, and the side of the scattering cavity away from the light guide plate 109 is wrapped by a reflector lampshade 110, and the reflector 113 cooperates with the reflector lampshade 110 to The laser light is reflected onto the light guide plate 109 . Specifically, the scattering particles 112 in the cavity of the scattering rod scatter the light, because the scattering lampshade half-wraps the cavity of the scattering rod, and cooperates with the reflector 113 arranged at the opposite end of the scattering rod 107 to the interface 108 of the optical fiber 106 , to reflect the light out of the scattering rod 107, and set it on the side of the light guide plate 109, wherein the scattering particles 112 are acrylic particles, of course, they can also be other substances with scattering ability.

As shown in Figures 8 and 9, of course, the display light source structure is not unique, wherein preferably, the display light source is a laser light source array 114, and the laser light source array 114 includes red laser light sources 117, green laser light sources The laser light source 118, the blue laser light source 119, and the red laser light source 117, the green laser light source 118, and the blue laser light source 119 each include at least one laser light. A diffuser plate 115 is also arranged above the laser light source array 114, which is used to diffuse the light from the laser light source array 114, so that the transmitted light can be evenly diffused, increase the luminous angle, and pass through the diffuser plate 115, the optical film 116 emits light. The laser array is used as a display light source, which is similar to the setting position of the above-mentioned scattering rods 107. It can be set on the side of the light guide plate 109 away from the light-emitting surface, that is, a direct display light source, and can be set on the side relative to the light guide plate 109. On the side of the light-emitting surface. It should be noted that the red laser light source 117, the green laser light source 118, and the blue laser light source 119 are all wavelength-tunable, and the adjustment of the wavelength can also be realized by adjusting the current. The described methods will not be repeated here. Of course, it is not limited to the red laser light source 117, the green laser light source 118, and the blue laser light source 119, and may also be laser light sources of other colors, as long as the wavelength is tunable.

In this embodiment, both the rear projection display device and the display light source of the liquid crystal display device have a compact structure and low cost.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (10)

1. a display unit, it comprises: display light source, it is characterized in that, described display light source comprises single primary colours laser of at least one tunable wave length,

When showing every width 3D picture, described single primary colours laser at least can be launched the first laser constantly first, and launch the second laser constantly second, and described the first laser is different from the peak wavelength of described the second laser, wherein, described first is constantly constantly continuous with described second, and described the first laser is used for showing the first frame picture, and described the second laser is used for showing the second frame picture.

2. display unit according to claim 1, is characterized in that, described display light source comprises single primary colours laser of three tunable wave lengths, and three described mono-colour lasers comprise red laser, green laser and blue laser,

Described first constantly, described red laser is launched the first red laser, described green laser is launched the first green laser, and described blue laser is launched the first blue laser, and the first red laser, the first green laser, the first blue laser are used for showing the first frame picture;

Described second constantly, described red laser is launched the second red laser, described green laser is launched the second green laser, and described blue laser is launched the second blue laser, and the second red laser, the second green laser, the second blue laser are used for showing the second frame picture.

3. display unit according to claim 1, is characterized in that, described display light source also comprises: signal generating module, laser driver module, controller,

Described controller is controlled described signal generating module and is produced different current signals, described signal generating module offers described laser driver module by described different current signal, described laser driver module produces different drive currents according to the different current signal receiving, for driving corresponding described single primary colours laser to launch described the first laser or described the second laser.

4. display unit according to claim 3, is characterized in that, described display light source also comprises: monitoring module,

Described monitoring module connects with corresponding described single primary colours laser, for monitoring the peak wavelength of the laser that described single primary colours laser launches, described monitoring module feeds back to controller by the peak wavelength of described the first laser or the second laser, to regulate the electric current output of laser driver module.

5. display unit according to claim 4, is characterized in that, described display light source also comprises: automatic control module,

Described monitoring module feeds back to controller by described automatic control module by the peak wavelength of described the first laser or the second laser, to regulate the electric current output of laser driver module.

6. according to the display unit described in any one in claim 1～5, it is characterized in that, described display light source also comprises: coupler,

Described single primary colours laser is respectively by being connected with described coupler with each self-corresponding optical fiber, for the first laser or the second laser that synchronization is launched, via described coupler, adopt same propagation path to be passed to display module, so that described display unit shows image.

7. display unit according to claim 6, is characterized in that, described display light source also comprises: projection module,

Described projection module is arranged between described coupler and described display module, for the laser of exporting via described coupler is processed, and is projected on described display module, to show respective picture.

8. display unit according to claim 6, is characterized in that, described display light source also comprises: at least one scattering rod and light guide plate,

Described scattering rod is used for the laser from coupler to spread, and forms area source by light guide plate.

9. display unit according to claim 8, it is characterized in that, described display light source also comprises reflection lampshade, described scattering rod comprises: scattering rod cavity, and be arranged on the scattering particles in scattering rod cavity, and in one end of described scattering rod cavity, be provided with laser entrance, on its other end, be provided with reflector plate, described reflection lampshade is arranged on the side that described scattering rod cavity deviates from light guide plate, and described reflector plate coordinates and reflects the laser light in light guide plate with described transmitting lampshade.

10. according to the display unit described in any one in claim 1～5, it is characterized in that, described display light source is laser lamp source array,

Described laser lamp source array comprises that interval arranges red laser lamp source, green laser lamp source, blue laser lamp source, and described red laser lamp source, green laser lamp source, blue laser lamp source all at least comprise a laser lamp.

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